The World Digital Magnetic Anomaly Map: version 2.1

2020 ◽  
Author(s):  
Jerome Dyment ◽  
Yujin Choi ◽  
Vincent Lesur ◽  
Andreina Garcia-Reyes ◽  
Manuel Catalan ◽  
...  
Keyword(s):  
Magnetic Anomaly ◽  
International Association ◽  
Magnetic Data ◽  
International Polar Year ◽  
The World ◽  
International Polar ◽  
Geological Map ◽  
Version 2.0 ◽  
Anomaly Map ◽  
The Antarctic

<p>The World Digital Magnetic Anomaly Map (WDMAM) is an initiative of the IAGA (International Association of Geomagnetism and Aeronomy) supported by the CGMW (Commission for the Geological Map of the World) of UNESCO. The second version was released in 2015 (Dyment et al., 2015; Lesur et al., 2016), and mandate was given to the authors to update this version 2.0 using the same methodology as often as newly available data would make it necessary. Five better datasets justify the preparation and release of version 2.1: (1) the complete digital aeromagnetic map of Brasil made available to CGMW by Agência Nacional do Petróleo, Gás Natural e Biocombustíveis; (2) an improved version of the aeromagnetic map of Russia prepared at VSEGEI; (3) the second version of the Antarctic Digital Magnetic Anomaly maP (ADMAP; Golynsky et al., 2018) which construction results from a remarkable international effort during and after the Second International Polar Year; (4) a new map of the Caribbean plate and Gulf of Mexico resulting from the compilation and re-processing of existing marine and aeromagnetic data in the area (Garcia, 2018); and (5) a new compilation of marine magnetic data worldwide. The new map shows significant improvements over the previous versions and will be shortly available at wdmam.org.</p>

Magnetic anomaly map of the world: merging satellite, airborne, marine and ground-based magnetic data sets

2007 ◽  
Vol 260 (1-2) ◽  
pp. 56-71 ◽  
Author(s):  
Kumar Hemant ◽  
Erwan Thébault ◽  
Mioara Mandea ◽  
Dhananjay Ravat ◽  
Stefan Maus
Keyword(s):  
Magnetic Anomaly ◽  
Magnetic Data ◽  
Data Sets ◽  
The World ◽  
Anomaly Map

The Earth's magnetic field variations at the Algerian magnetic observatory of Tamanrasset from 1932 to 2020.

2021 ◽  
Author(s):  
Lemgharbi Abdenaceur ◽  
Hamoudi Mohamed ◽  
Abtout Abdeslam ◽  
Abdelhamid Bendekken ◽  
Ener Aganou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
International Association ◽  
Sampling Rate ◽  
Magnetic Data ◽  
Magnetic Observatory ◽  
Earth’S Magnetic Field ◽  
Data Set ◽  
Secular Variations ◽  
The World ◽  
Earth's Magnetic Field

<p>In order to understand the spatial and temporal behavior of the Earth's magnetic field, scientists, following C.F. Gauss initiative in 1838 have established observatories around the world. More than 200 observatories aiming to continuously record, the time variations of the magnetic field vector and to maintain the best standard of the accuracy and resolution of the measurements.</p><p>This study focused on the acquisition and analysis of the magnetic data provided by the Algerian magnetic observatory of Tamanrasset (labelled TAM by the International Association of Geomagnetism and Aeronomy). This observatory is located in southern Algeria at 5.53°E longitude, 22.79°N Latitude. Its altitude is 1373 meters above msl. TAM is continuously running since 1932, using old brand variometers, like Mascart and La Cour with photographic recording at the very beginning. Nowadays modern electronic equipment are used in the framework of INTERMAGNET project. Very large geomagnetic database collected over a century is available. We will describe the history and the various improvement of the methods and instrumentation.</p><p>Preliminary analysis of time series of the observatory data allowed to distinguish two kinds of data: the first type, with low resolution, collected between 1932 and 1992. This data set comes from the annual, monthly, daily and hourly means. The second one with high resolution is represented by minutes and seconds sampling rate since 1993 when TAM was integrated to the world observatory network, INTERMAGNET. Part of the second dataset contains many gaps. We try to fill these gaps thanks to mathematical methods. Absolute measurements and repeat station data allow better accuracy in the secular variations and an improved regional model.</p><p>Keywords: TAM observatory, temporal variation, terrestrial magnetic field, secular variations, INTERMAGNET.</p>

scholarly journals Education and outreach by the Antarctic Treaty Parties, Observers and Experts under the framework of the Antarctic Treaty Consultative Meetings

Polar Record ◽  
2018 ◽  
Vol 55 (4) ◽  
pp. 241-244 ◽  
Author(s):  
José C. Xavier ◽  
Dragomir Mateev ◽  
Linda Capper ◽  
Annick Wilmotte ◽  
David W. H. Walton
Keyword(s):  
International Union ◽  
International Polar Year ◽  
Daily Lives ◽  
Educational Value ◽  
International Polar ◽  
Antarctic Research ◽  
Antarctic Treaty ◽  
Education And Outreach ◽  
The Antarctic

AbstractThe development of formal discourse about education and outreach within the Antarctic Treaty Consultative Meetings (ATCM), and the influence of major international activities in this field, are described. This study reflects on the ATCM Parties’ approach to implementing the ambition of the Protocol on Environmental Protection to the Antarctic Treaty Article 6.1.a, to promote the educational value of Antarctica and its environment, and examines the role of workshops and expert groups within the Scientific Committee on Antarctic Research (SCAR), the International Union for the Conservation of Nature (IUCN), and the Council of Managers of National Antarctic Programmes. These early initiatives, which emerged in the 1990s, were a prelude to the development and implementation of a large number of International Polar Year (IPY) education and outreach programmes. The establishment of an Antarctic Treaty System Intersessional Contact Group, and an online forum on education and outreach during the 2015 ATCM in Bulgaria, is a legacy of IPY and is the next step in fostering collaboration to engage people around the world in the importance and relevance of Antarctica to our daily lives.

Arctic shipping guidelines: towards a legal regime for navigation safety and environmental protection?

Polar Record ◽  
2008 ◽  
Vol 44 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Øystein Jensen
Keyword(s):  
The Arctic ◽  
Legal Issue ◽  
Polar Regions ◽  
International Polar Year ◽  
Safety Standards ◽  
International Polar ◽  
Key Issues ◽  
Arctic Ice ◽  
The Antarctic ◽  
Near Future

ABSTRACTWith the International Polar Year (IPY) having commenced in March 2007, key issues relating to the polar regions are again in focus. This article reviews one central legal issue re-emerging in the Arctic: global regulation of safety standards for international shipping. The ‘Guidelines for ships operating in Arctic ice-covered waters’ are examined, with a view to the probable expansion of shipping in the Arctic in near future. Following an introduction to navigational issues within the Arctic context, the article describes how the guidelines came into being, and then analyses key elements and structure of the regulations and shortfalls of today's arrangements. The possible relevance of the guidelines to the Antarctic is also discussed briefly. Finally, the article inquires into the key repercussions of introducing binding regulations.

scholarly journals National Geophysical Data Center candidate for the World Digital Magnetic Anomaly Map

2007 ◽  
Vol 8 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
S. Maus ◽  
T. Sazonova ◽  
K. Hemant ◽  
J. D. Fairhead ◽  
Dhananjay Ravat
Keyword(s):  
Magnetic Anomaly ◽  
Data Center ◽  
Geophysical Data ◽  
The World ◽  
National Geophysical Data ◽  
Anomaly Map ◽  
National Geophysical Data Center

scholarly journals Von Neumayer and the origins of Australian and international meteorology

2011 ◽  
Vol 123 (1) ◽  
pp. 70 ◽  
Author(s):  
John Zillman
Keyword(s):  
International Cooperation ◽  
19Th Century ◽  
World Meteorological Organization ◽  
Short List ◽  
International Polar Year ◽  
The World ◽  
International Polar ◽  
The 19Th Century

Georg von Neumayer played a central role in building the foundations of Australian meteorology and in shaping the global framework of cooperation under the International Meteorological Organization (IMO), the forerunner of the World Meteorological Organization (WMO). Though his time in Australia was relatively brief, his name stands alongside those of Lieutenant William Dawes (active from 1788-1791), Sir Thomas Brisbane (1822-24), Robert Ellery (1863-1895), Sir Charles Todd (1856-1906), Clement Wragge (1883-1903) and Henry Chamberlain Russell (1859-1904) in the short list of Australia’s outstanding meteorological pioneers; and with Lt. Matthew Fontaine Maury, Admiral Robert FitzRoy and Professors C.H.D. Buys Ballot, H. Wild and E. Mascart in building the 19th century framework for international cooperation in meteorology, especially through his role as President of the International Polar Commission which organised the First International Polar Year (1882-83). This paper provides a brief overview of the origins of Australian meteorology and of the 1873 establishment and early work of the IMO in providing the international framework for cooperation in meteorology until its replacement by the intergovernmental WMO in 1950.

Presentation of magnetic anomaly map data by stereo projection of magnetic shadowgrams

1985 ◽  
Vol 22 (2) ◽  
pp. 311-314 ◽  
Author(s):  
John Broome ◽  
Réjean Simard ◽  
Dennis Teskey
Keyword(s):  
Magnetic Anomaly ◽  
Geological Mapping ◽  
Geological Survey ◽  
Magnetic Data ◽  
Stereo Pair ◽  
Magnetic Intensity ◽  
Fine Detail ◽  
Anomaly Map ◽  
Map Data ◽  
Shaded Relief

Coloured magnetic maps published at the 1:1 000 000 scale by the Geological Survey of Canada have been found to be useful aids in support of regional geological mapping and compilation projects. However, because of the quantization into colour intervals, some of the fine detail contained in the original magnetic data is lost. These smaller features can be brought out quite effectively with the shaded relief technique, although there is an attendant loss of amplitude information, which can be recovered by means of stereo-shadowgrams. A second shadowgram is produced by offsetting the original shadowgram by an amount proportional to the magnetic intensity of each data point and then the offset and original shadowgrams are viewed as a stereo pair. An example of the effectiveness of these techniques is the detail that can be seen on the shadowgrams and stereo-shadowgrams for the Lockhart River (IMW NP 12/13) and the Thelon River (IMW NQ 12/13/14) map sheets.

Some reflections on the Antarctic Treaty

Polar Record ◽  
2009 ◽  
Vol 46 (1) ◽  
pp. 2-4 ◽  
Author(s):  
F.W.G. Baker
Keyword(s):  
50Th Anniversary ◽  
The Arctic ◽  
International Polar Year ◽  
International Geophysical Year ◽  
International Polar ◽  
Antarctic Treaty ◽  
Major Increase ◽  
The Antarctic ◽  
International Geophysical ◽  
Made In

2009 brings not only the 50th anniversary of the Antarctic Treaty but also the end of the International Geophysical Year (IGY) and of its extension into the period of International Geophysical Cooperation (IGC 1959). It is also the 133rd anniversary of K. Weyprecht's suggestion that initiated the impetus. As he noted, ‘if Polar Expeditions are looked upon merely as a sort of international steeple-chase . . . and their main object is to exceed by a few miles the latitude reached by a predecessor these mysteries (of Meteorology and Geomagnetism) will remain unsolved’ (Weyprecht 1875). Although he stressed the importance of observations in both the Arctic and Antarctic during the first International Polar Year (IPY) in 1882–1883 only two stations in the sub-Antarctic region, at Cap Horn and South Georgia, made such scientific recordings. In spite of the fact that several expeditions to the Antarctic had been made in the period between the first and the second IPY 1932–1933, no stations were created in Antarctica during that IPY. The major increase in scientific studies in Antarctica came with the third IPY, which became the IGY of 1957–1958.

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